Method of implementing one-to-one binary function and relative hardware device, especially for a Rijndael S-box
US7502464B2 · kind B2 · utility
11Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2004 |
| Grant date | Mar 10, 2009 |
| Priority date | — |
| Expiry date | Jan 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for implementing one-to-one binary functions defined on the Galois field GF(28) is very useful for forming fast and low power hardware devices regardless of the binary function. The method includes decoding an input byte for generating at least one bit string that contains only one active bit, and logically combining the bits of the bit string according to the binary function for generating a 256-bit string representing a corresponding output byte. The 256-bit string is then encoded in a byte for obtaining the output byte.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.